@cor3zone She's not really bad, imo. She's just opposite our point of view character and acts kind of unlikable, but she's not
wrong. I mean, we've seen what vampires can do (remember how the JK vamp sent a dude down a madness spiral almost by accident out of boredom?) and how they think (didn't think too much of killing MC should he not cooperate). And that's before their demonstrated actual physical abilities like super strength, and flight, and whatnot.
If anything, we can probably assume that Nazuna is a bit of an exception, which aligns with the other vampires seeing her as a weirdo and an oddity. So the detective lady definitely has a point. Vampires are dangerous, they seem at least a little unpredictable, and the MC was going into the whole thing a little half-cocked. I think it's good that he's now forced to confront these things.